Welcome to BYC. Glad you decided to join our flock. I tried building a homemade incubator and never had any success with it, so I finally bought an inexpensive styrofoam incubator with an air circulating fan and an auto egg turner and had a good hatch rate from it. I know that some BYC members have built homemade incubators that worked reasonably well, so definitely check out the links that TwoCrows and Kelsie2290 have left you with. Please feel free to ask any other questions you may have. We are here to help in any way we can. Good luck in building your incubator.